[time-nuts] low noise multiplication to 100 MHz

Artek Manuals Manuals at ArtekManuals.com
Fri Jan 22 20:43:53 UTC 2016

On 1/22/2016 12:20 PM, jimlux wrote:
> On 1/22/16 2:15 AM, REEVES Paul wrote:
>> Why not use something like an HP5254B/C ? They give out  50MHz 
>> harmonics up to the low Ghz region, all filtered by a nice high-Q 
>> tuneable cavity. All to typical HP build quality.
>> Of course, they have an amount of 'not needed' circuitry and are just 
>> a bit  ..... , well, bulky.  Good clean output from 10MHz in though.
> I guess I wasn't totally clear in my original post. I was looking for 
> ideas on circuits - I'm trying to fit this into a few square cm of 
> board real estate.
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OK ...coming back to the original post and see if we can nail down ALL 
the design requirements

You said

"My tiny 100 MHz low noise OCXOs are unexpectedly delayed at the mfr, and
I'm looking at alternative schemes.
One is to get 10 or 20 MHz OCXOs (typically in stock) and multiply them
up. I've got the Wenzel ap notes on 2diode and using HCMOS (and I've
used the packaged Wenzel multipliers), and I think I have some spare
board real estate on another board."

So I ask then, what is the real set of design requirements

1) Space of a few sq CM is the goal
2) 5X or 10X  frequency multiplication
3) Input and output level (?????????)
4)Title said "Low Noise"  needs better definition as to what kind of 
noise and how far down. Are we to be  concerned about harmonic and spur 
content as compared to real random white noise?
5) Power requirements (0 to 5V  at ?? ma ...or?)
6) Stability requirement in PPM?


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